Chronic pyelonephritis is continuing pyogenic infection of the kidney that occurs virtually specifically in patients with major anatomic problems. Symptoms consist of fever, malaise, and flank pain. Medical diagnosis is with urinalysis, culture, and imaging tests. Treatment is with antibiotics and correction of any structural disorders.
The majority of urinary tract infections (UTIs) involve just the bladder and urethra (the lower urinary system). Pyelonephritis (kidney infection) results when a UTI progresses to involve the upper urinary system (the kidneys and ureters).